/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *    http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.apache.gobblin.converter;

import org.apache.avro.Schema;
import org.apache.avro.generic.GenericRecord;

import org.apache.gobblin.kafka.client.DecodeableKafkaRecord;


/**
 * A {@link org.apache.gobblin.stream.ControlMessageInjector} that detects changes in the latest schema and notifies downstream constructs by
 * injecting a {@link org.apache.gobblin.stream.MetadataUpdateControlMessage}.
 * Also supports multi-dataset schema changes.
 */
public class GenericRecordBasedKafkaSchemaChangeInjector extends KafkaSchemaChangeInjector<Schema> {
  @Override
  protected Schema getSchemaIdentifier(DecodeableKafkaRecord consumerRecord) {
    GenericRecord genericRecord = (GenericRecord) consumerRecord.getValue();
    return genericRecord.getSchema();
  }
}